How To Fix UPWB191 - Class &1 is not a subclass of CL_UPWB_BSP_APPL

SAP Error Message - Details

• Message type: E = Error

• Message class: UPWB - Messages for Development Class UPWB

• Message number: 191

• Message text: Class &1 is not a subclass of CL_UPWB_BSP_APPL

What causes this issue?

It is specified that the ABAP application class is not to be generated.
In this case the specified class has to be a subclass of standard class
<AB>CL_UPWB_BSP_APPL</>. The specified class <AB>&V1&</> is not a
subclass or is not active.

System Response

If the BSP application is generated in the Web Interface Builder,
generation may fail. If generation is successful and you start the
Web application, an error may occur if the BSP page does not correspond
to the data that delivers the class.

How to fix this error?

Use the standard class or a subclass of standard class <AB>CL_UPWB_BSP_
APPL</>, or set the "Generate class" setting to <SE><AB>true</></>.
If the specified class has been generated by the Web Interface Builder
before, also set the "Generate class" setting to <AB>true</>. Then you
will be asked explicitely before each generation whether your class
should be overwritten.
You will find more information in the F1 documentation on the "Generate
class" setting.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.